2024 Ram 3500 Fluid Type Specifications

Quick reference

Fluid	Type/Spec	Capacity
Engine Oil
6.4L HEMI (Gas)	SAE 5W-20, Mopar MS-6395, API SP	7.0 quarts (6.6 liters)
6.7L Cummins (Diesel)	SAE 10W-30 or 5W-40 (see notes), Mopar MS-10902, API CK-4	12.0 quarts (11.3 liters)
Engine Coolant	Mopar OAT Antifreeze/Coolant, MS-90032, Purple	16.0 - 24.0 quarts (15.1 - 22.7 liters) (approx)
Transmission Fluid
8HP75 (Gas)	Mopar ZF 8&9 Speed ATF, ZF LifeguardFluid 8	5.5 quarts (5.2 liters) + pan drop fill
Aisin AS69RC (Diesel)	Mopar AS69RC ATF	12.0 - 17.5 quarts (11.3 - 16.5 liters) (approx)
Transfer Case
BW 44-46/44-48	Mopar ATF+4, MS-9602	1.7 - 2.0 quarts (1.6 - 1.9 liters) (approx)
Front Differential
11.5 AAM	SAE 75W-85 Synthetic Axle Lubricant, MS-11106	3.0 quarts (2.8 liters)
Rear Differential
12.0/12.25 AAM	SAE 75W-85 Synthetic Axle Lubricant, MS-11156 (without LSD)	4.0 quarts (3.8 liters) (approx)
	SAE 75W-85 Synthetic Axle Lubricant, MS-11156 + Mopar Friction Modifier (with LSD)	4.0 quarts (3.8 liters) (approx)
Brake Fluid	Mopar DOT 3 or DOT 4, MS-4574	As needed
Power Steering	Mopar MS-5931	As needed
Washer Fluid	Mopar Windshield Washer Concentrate	1.0 gallon (3.8 liters)
Diesel Exhaust Fluid (DEF)	API Certified Diesel Exhaust Fluid, ISO 22241	5.0 gallons (18.9 liters) (approx)

Engine Oil

6.4L HEMI (Gasoline Engine)

For the 2024 Ram 3500 equipped with the 6.4L HEMI V8 engine, the factory specified engine oil is SAE 5W-20 meeting Mopar Material Standard MS-6395 and API Service Category SP. It is crucial to use oil that meets these specifications to ensure proper engine lubrication, protection, and compliance with warranty requirements.

• Capacity: 7.0 quarts (6.6 liters)
• Interval: For normal duty, generally every 8,000-10,000 miles or 12 months, whichever comes first. Refer to your owner's manual for exact intervals based on your driving conditions (e.g., severe duty may require more frequent changes).
• Pitfalls: Using an oil that does not meet the MS-6395 specification can lead to increased engine wear and potential damage. Never use oils with a higher or lower viscosity than recommended, as this can impact variable valve timing (VVT) operation and overall engine efficiency. Always verify the API Service Category on the oil bottle to ensure it is API SP or a newer, backward-compatible category.

6.7L Cummins (Diesel Engine)

For the 2024 Ram 3500 with the 6.7L Cummins Turbo Diesel engine, the recommended engine oil is Mopar MS-10902 compliant, full synthetic, and meets API Service Category CK-4. The primary recommended viscosity is SAE 10W-30. However, for sustained ambient temperatures below 0°F (-18°C), SAE 5W-40 is permissible. Always consult your owner's manual for the most accurate viscosity recommendations based on your local climate and driving conditions.

• Capacity: 12.0 quarts (11.3 liters)
• Interval: Typically, every 15,000 miles or 12 months, or 500 operating hours, whichever comes first, under normal operating conditions. Severe duty or heavy towing will shorten this interval. Always follow the Oil Change Indicator System (OCIS) in your vehicle.
• Pitfalls: Using engine oil that does not meet the API CK-4 specification or Mopar MS-10902 can damage the emissions system (e.g., Diesel Particulate Filter - DPF) and lead to premature engine wear. Never use engine oils with older API service categories like CJ-4 if CK-4 is specified, as they may not provide adequate protection for newer diesel engines with advanced emissions systems.

Engine Coolant

The 2024 Ram 3500 utilizes Mopar OAT Antifreeze/Coolant (Organic Additive Technology) which is typically purple in color. It must meet Mopar Material Standard MS-90032. This is a long-life coolant designed for extended service intervals.

• Capacity: Approximately 16.0 - 24.0 quarts (15.1 - 22.7 liters), depending on configuration and cooling system design. This is an approximate fill for a complete system flush and fill. Always refill to the "FULL" mark on the reservoir.
• Interval: Generally, the first change is recommended at 10 years or 150,000 miles, then every 5 years or 100,000 miles thereafter. Always verify in your owner's manual.
• Pitfalls: NEVER mix OAT coolant with other coolant types, especially HOAT (Hybrid Organic Additive Technology) or traditional IAT (Inorganic Additive Technology) coolants. Mixing different coolant chemistries can lead to severe issues, including gel formation, corrosion, clogging of the cooling system, and engine overheating. Always use only MS-90032 compliant OAT coolant, preferably the Mopar branded product or an officially licensed equivalent. Ensure the system is properly bled of air after any coolant service.

Transmission Fluid

ZF 8HP75 Automatic Transmission (Gasoline Engine)

The 8-speed automatic ZF 8HP75 transmission found in the 6.4L HEMI Ram 3500 requires Mopar ZF 8&9 Speed ATF which is equivalent to ZF LifeguardFluid 8.

• Capacity: Approximately 5.5 quarts (5.2 liters) for a pan drop and filter change. A complete overhaul will require more. Always follow the factory fill procedure and check the fluid level precisely according to the service manual.
• Interval: ZF transmissions are often marketed as "fill-for-life," but in heavy-duty truck applications, particularly with towing or severe usage, a fluid and filter change between 60,000 to 100,000 miles is highly recommended for longevity. Always refer to your owner's manual for Ram's specific recommendations.
• Pitfalls: Using an incorrect transmission fluid can cause irreversible damage to the transmission and void your warranty. Universal ATFs or those not specifically approved for ZF 8-speed transmissions should never be used. The fluid level procedure for these transmissions is sensitive, often requiring specific temperature ranges; improper leveling can lead to operational issues.

Aisin AS69RC Automatic Transmission (Diesel Engine)

The Aisin AS69RC heavy-duty automatic transmission in the 6.7L Cummins Ram 3500 requires Mopar AS69RC ATF. This is a highly specialized fluid.

• Capacity: Approximately 12.0 - 17.5 quarts (11.3 - 16.5 liters) for a full service including torque converter and lines. A pan drop will be significantly less. Verify exact fill in the service manual.
• Interval: Under normal conditions, inspect fluid levels regularly. For severe duty, towing, or commercial use, fluid and filter changes may be recommended around 30,000 to 60,000 miles. Consult your owner's manual.
• Pitfalls: The Aisin AS69RC is a robust but particular transmission. Only use the specified Mopar AS69RC ATF. Substituting with other types of ATF, even so-called "universal" fluids, can lead to slippage, harsh shifts, and premature transmission failure. The cost of repair far outweighs the cost of proper fluid.

Transfer Case

For 4WD/AWD models of the 2024 Ram 3500, various BorgWarner (BW) transfer cases (e.g., BW 44-46, BW 44-48) are utilized. These units typically require Mopar ATF+4 which meets Mopar Material Standard MS-9602.

• Capacity: Approximately 1.7 - 2.0 quarts (1.6 - 1.9 liters). Always fill to the bottom of the fill plug hole.
• Interval: Typically, every 60,000 miles under normal conditions, or sooner for heavy-duty use, off-roading, or frequent towing/hauling.
• Pitfalls: Do not use Dexron-type fluids or universal ATFs in place of ATF+4. While some may appear similar, their friction characteristics and additive packages are different, which can lead to premature wear and failure of the transfer case clutch packs and seals. Ensure you use genuine Mopar ATF+4 or an officially licensed equivalent meeting MS-9602.

Differential Fluid

Front Differential (11.5 AAM)

The front differential common in the 2024 Ram 3500 (e.g., 11.5 AAM) requires SAE 75W-85 Synthetic Axle Lubricant meeting Mopar Material Standard MS-11106.

• Capacity: Approximately 3.0 quarts (2.8 liters). Fill to the correct level as indicated in the service manual.
• Interval: Typically, every 30,000 miles for heavy duty or off-road use, or as recommended for normal duty in your owner's manual (often 60,000 miles or more).
• Pitfalls: Always use a synthetic gear oil that meets the specified viscosity and Mopar MS-11106. The use of non-synthetic or incorrect viscosity oil can lead to accelerated wear and noise. Ensure the differential cover gasket (or RTV sealant) is properly installed to prevent leaks.

Rear Differential (12.0 / 12.25 AAM)

The rear differentials (e.g., 12.0 AAM, 12.25 AAM) in the 2024 Ram 3500 generally require SAE 75W-85 Synthetic Axle Lubricant meeting Mopar Material Standard MS-11156.

• Capacity: Approximately 4.0 quarts (3.8 liters). Fill to the correct level.
• Limited Slip Differential (LSD) Note: If your truck is equipped with a Limited Slip Differential, you MUST add MS-10111 Mopar Friction Modifier (AAMCO Part No. 40008474) to the specified gear oil. Failure to add friction modifier to an LSD-equipped differential will result in chatter and potential damage to the clutch packs.
• Interval: Same as the front differential, approximately every 30,000 miles for heavy duty or off-road use, or as recommended for normal duty (often 60,000 miles or more).
• Pitfalls: Using an incorrect viscosity or non-synthetic oil can lead to premature wear. For LSDs, the omission of friction modifier is a common oversight that causes operational issues. Double-check your truck's configuration for an LSD (identified by a label on the differential or by VIN decoding).

Brake Fluid

The 2024 Ram 3500 uses Mopar DOT 3 or DOT 4 Brake Fluid which meets Mopar Material Standard MS-4574. DOT 4 fluid offers a higher dry and wet boiling point than DOT 3, providing a margin of safety, especially for heavy-duty applications like towing.

• Capacity: As needed to maintain the proper level in the reservoir.
• Interval: Generally recommended every 2 years or 30,000 miles. Brake fluid is hygroscopic (absorbs moisture), which lowers its boiling point and can lead to internal corrosion over time.
• Pitfalls: Never mix DOT 3, DOT 4, or DOT 5.1 with DOT 5 fluid. DOT 5 is silicone-based and incompatible with other types of brake fluid. Always keep brake fluid containers sealed, as it rapidly absorbs moisture from the air. Using old or contaminated brake fluid can lead to a spongy pedal, reduced braking performance, and corrosion of ABS components. Use fresh fluid from a sealed container.

Power Steering Fluid

For the 2024 Ram 3500, the specified power steering fluid is Mopar MS-5931.

• Capacity: As needed to maintain the proper level in the reservoir.
• Interval: Typically, it is inspected rather than routinely changed. Refer to your owner's manual for specific inspection intervals.
• Pitfalls: Using an incorrect power steering fluid can lead to pump whine, steering issues, and premature wear of power steering components. Do not substitute with transmission fluid or universal power steering fluids unless they explicitly state compliance with MS-5931.

Washer Fluid

The 2024 Ram 3500 uses standard Mopar Windshield Washer Concentrate diluted with water, or a pre-mixed windshield washer fluid suitable for automotive use. For cold climates, ensure an antifreeze-rated washer fluid is used.

• Capacity: Approximately 1.0 gallon (3.8 liters) in the reservoir.
• Interval: As needed, replace when low.
• Pitfalls: Avoid using plain water, especially in freezing temperatures, as it can freeze and damage the washer system components. Do not use household glass cleaners, as they can damage paint or trim.

Diesel Exhaust Fluid (DEF)

For the 6.7L Cummins Diesel engine, Diesel Exhaust Fluid (DEF) is required for the Selective Catalytic Reduction (SCR) system. It must be API Certified Diesel Exhaust Fluid and meet ISO 22241 standards.

• Capacity: Approximately 5.0 gallons (18.9 liters) in the dedicated DEF tank.
• Interval: DEF consumption rates vary based on driving conditions, load, and engine operation. The vehicle's gauge and warning lights will indicate when a refill is needed. Typically, a full tank lasts for several thousand miles.
• Pitfalls: NEVER put DEF into the diesel fuel tank, and NEVER put diesel fuel into the DEF tank. This will cause catastrophic damage to both the engine and the emissions system. Only use API-certified DEF that meets ISO 22241. Contaminated or counterfeit DEF can severely damage the SCR system. Store DEF in a cool, dry place and use it within its shelf life, as it can degrade over time and with exposure to direct sunlight.

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